/****************************************************************************
 *
 * Copyright 2016 Samsung Electronics All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific
 * language governing permissions and limitations under the License.
 *
 ****************************************************************************/
/****************************************************************************
 * libc/stdio/lib_fputs.c
 *
 *   Copyright (C) 2007, 2008, 2011-2012 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ****************************************************************************/

/****************************************************************************
 * Compilation Switches
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <tinyara/config.h>

#include <stdio.h>
#include <string.h>
#include <errno.h>

#include <tinyara/arch.h>

#include "lib_internal.h"

/****************************************************************************
 * Definitions
 ****************************************************************************/

/****************************************************************************
 * Private Type Declarations
 ****************************************************************************/

/****************************************************************************
 * Private Function Prototypes
 ****************************************************************************/

/****************************************************************************
 * Global Function Prototypes
 ****************************************************************************/

/****************************************************************************
 * Global Constant Data
 ****************************************************************************/

/****************************************************************************
 * Global Variables
 ****************************************************************************/

/****************************************************************************
 * Private Constant Data
 ****************************************************************************/

/****************************************************************************
 * Private Variables
 ****************************************************************************/

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: fputs
 *
 * Description:
 *   fputs() writes the string s to stream, without its trailing '\0'.
 *
 ****************************************************************************/

#if defined(CONFIG_ARCH_ROMGETC)
int fputs(FAR const char *s, FAR FILE *stream)
{
	int nput;
	int ret;
	char ch;

	/* Make sure that a string was provided. */

#ifdef CONFIG_DEBUG				/* Most parameter checking is disabled if DEBUG is off */
	if (!s) {
		set_errno(EINVAL);
		return EOF;
	}
#endif

	/* Write the string.  Loop until the null terminator is encountered */

	for (nput = 0, ch = up_romgetc(s); ch; nput++, s++, ch = up_romgetc(s)) {
		/* Write the next character to the stream buffer */

		ret = lib_fwrite(&ch, 1, stream);
		if (ret <= 0) {
			return EOF;
		}

		/* Flush the buffer if a newline was written to the buffer */

#ifdef CONFIG_STDIO_LINEBUFFER
		if (ch == '\n') {
			ret = lib_fflush(stream, true);
			if (ret < 0) {
				return EOF;
			}
		}
#endif
	}

	return nput;
}

#elif defined(CONFIG_STDIO_LINEBUFFER)
int fputs(FAR const char *s, FAR FILE *stream)
{
	int nput;
	int ret;

	/* Make sure that a string was provided. */

#ifdef CONFIG_DEBUG				/* Most parameter checking is disabled if DEBUG is off */
	if (!s) {
		set_errno(EINVAL);
		return EOF;
	}
#endif

	/* Write the string.  Loop until the null terminator is encountered */

	for (nput = 0; *s; nput++, s++) {
		/* Write the next character to the stream buffer */

		ret = lib_fwrite(s, 1, stream);
		if (ret <= 0) {
			return EOF;
		}

		/* Flush the buffer if a newline was written to the buffer */

		if (*s == '\n') {
			ret = lib_fflush(stream, true);
			if (ret < 0) {
				return EOF;
			}
		}
	}

	return nput;
}

#else
int fputs(FAR const char *s, FAR FILE *stream)
{
	int ntowrite;
	int nput;

	/* Make sure that a string was provided. */

#ifdef CONFIG_DEBUG				/* Most parameter checking is disabled if DEBUG is off */
	if (!s) {
		set_errno(EINVAL);
		return EOF;
	}
#endif

	/* Get the length of the string. */

	ntowrite = strlen(s);
	if (ntowrite == 0) {
		return 0;
	}

	/* Write the string */

	nput = lib_fwrite(s, ntowrite, stream);
	if (nput < 0) {
		return EOF;
	}
	return nput;
}
#endif
